That "no wasted contacts from missed cycles" part is huge, those ratcheting tools eat pins every time you don't get a full squeeze. Learning to feel the crimp on a mechanical one makes you way faster once it clicks, especially when you're doing a whole plug at once.

Preheat is the real deal. Ran hundreds of tubes on a condenser job in south Louisiana, winter mornings get cold and damp. Tube sheet just sweats. Roller goes in cold and the metal grabs uneven. Warms up and everything seats better. Old timers know. 150 is about right, not too hot to cook the lube. Never going back to cold rolling on a morning turnaround.

Honestly I just go coarser every week once they hit two weeks old.